667212608517 has 32 divisors (see below), whose sum is σ = 1159319653632. Its totient is φ = 331234182144.

The previous prime is 667212608479. The next prime is 667212608519. The reversal of 667212608517 is 715806212766.

It is not a de Polignac number, because 667212608517 - 2²³ = 667204219909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 667212608517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667212608519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71877778 + ... + 71887059.

It is an arithmetic number, because the mean of its divisors is an integer number (36228739176).

Almost surely, 2^667212608517 is an apocalyptic number.

It is an amenable number.

667212608517 is a deficient number, since it is larger than the sum of its proper divisors (492107045115).

667212608517 is a wasteful number, since it uses less digits than its factorization.

667212608517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143764877.

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 667212608517 in words is "six hundred sixty-seven billion, two hundred twelve million, six hundred eight thousand, five hundred seventeen".